# Relationship history for MSHA mine 3600184

Current hierarchy: **Carmeuse Holding SA → Carmeuse Lime & Stone Co Inc → Penroc**

- Valid-time bounds: inclusive, date granularity
- Null end: open-ended in the upstream history row; not independent proof of present control
- Transaction-time observation: 2026-10-13T11:19:05.459773+00:00

## Valid-time edges

- **operator_operates_mine:** Gold Bond Building Products → Penroc; 1950-01-01 to 1990-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge S A → Penroc; 1950-01-01 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge S A → Gold Bond Building Products; 1950-01-01 to 1990-02-05; source msha-controller-operator-history
- **controller_controls_mine:** Gary A  Mahan  et al → Penroc; 1989-12-07 to current/open; source msha-controller-operator-history
- **operator_operates_mine:** Pen Roc Inc → Penroc; 1990-02-06 to 1995-06-28; source msha-controller-operator-history
- **controller_controls_operator:** Gary A  Mahan  et al → Pen Roc Inc; 1990-02-06 to 1995-06-28; source msha-controller-operator-history
- **operator_operates_mine:** Global Stone Penroc Inc → Penroc; 1995-06-29 to 1998-06-21; source msha-controller-operator-history
- **controller_controls_mine:** Global Stone Corp → Penroc; 1995-06-29 to 1998-06-21; source msha-controller-operator-history
- **controller_controls_operator:** Global Stone Corp → Global Stone Penroc Inc; 1995-06-29 to 1998-06-21; source msha-controller-operator-history
- **operator_operates_mine:** O-N Minerals (PenRoc) Company  LP → Penroc; 1998-06-22 to 2008-10-20; source msha-controller-operator-history
- **controller_controls_mine:** Oglebay Norton Company → Penroc; 1998-06-22 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_operator:** Oglebay Norton Company → O-N Minerals (PenRoc) Company  LP; 1998-06-22 to 2008-02-12; source msha-controller-operator-history
- **controller_controls_mine:** Lafarge SA → Penroc; 2002-06-20 to 2015-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Penroc; 2008-02-13 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → O-N Minerals (PenRoc) Company  LP; 2008-02-13 to 2008-10-20; source msha-controller-operator-history
- **operator_operates_mine:** Carmeuse Lime & Stone Co Inc → Penroc; 2008-10-21 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Lafarge SA → Carmeuse Lime & Stone Co Inc; 2008-10-21 to 2015-07-14; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse Lime & Stone Co Inc; 2008-10-21 to 2015-07-14; source msha-controller-operator-history
- **controller_controls_mine:** Carmeuse Holding SA → Penroc; 2015-07-15 to current/open; source msha-controller-operator-history
- **controller_controls_operator:** Carmeuse Holding SA → Carmeuse Lime & Stone Co Inc; 2015-07-15 to current/open; source msha-controller-operator-history